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BPA Operator: Itohan Ukponmwan ramamani yeleswarapu
ICN uses the BPA operator to install KUD. It can install KUD either on Baremetal hosts or on Virtual Machines. The BPA operator is also used to install software on the machines after KUD has been installed successfully
KUD Installation
Baremetal Hosts: When a new provisioning CR is created, the BPA operator function is triggered, it then uses a dynamic client to get a list of all Baremetal hosts that were provisioned using Metal3. It reads the MAC addresses from the provisioning CR and compares with the baremetal hosts list to confirm that a host with that MAC address exists. If it exists, it then searches the DHCP lease file for corresponding IP address of the host, using the IP addresses of all the hosts in the provisioning CR, it then creates a host.ini file and triggers a job that installs KUD on the machines using the hosts.ini file. When the job is completed successfully, a k8s cluster is running in the Baremetal hosts. The bpa operator then creates a configmap using the hosts name as keys and their corresponding IP addresses as values. If a host containing a specified MAC address does not exist, the BPA operator throws an error.
Virtual Machines : ICN project uses Virtlet for provisioning virtual machines in the edge locations. For this release, it involves a nested Kubernetes implementation. Kubernetes is first installed with Virtlet. Pod spec files are created with cloud init user data, network annotation with mac address, CPU and Memory requests. Virtlet VMs are created as per cluster spec or requirement. Corresponding provisioning custom resources are created to match the mac addresses of the Virtlet VMs.BPA operator checks the provisioning custom resource and maps the mac address(es) to the running Virtlet VM(s). BPA operator gets the IP addresses of those VMs and initiates an installer job which runs KuD scripts in those VMs. Upon completion, the K8s cluster is ready running in the Virtlet VMsresources are created to match the mac addresses of the Virtlet VMs.
BPA operator checks the provisioning custom resource and maps the mac address(es) to the running Virtlet VM(s). BPA operator gets the IP addresses of those VMs and initiates an installer job which runs KuD scripts in those VMs. Upon completion, the K8s cluster is ready running in the Virtlet VMs.
Software Installation
When a new software CR is created, the reconcile loop is triggered, on seeing that it is a software CR, the bpa operator checks for a configmap with a cluster label corresponding to that in the software CR, if it finds one, it gets the IP addresses of all the master and worker nodes, ssh's into the hosts and installs the required software. If no corresponding config map is found, it throws an error.
BPA Rest Agent: Enyinna Ochulor
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